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In page Jean Valjean:

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Valjean's character is loosely based on the life of Eugène François Vidocq, an ex-convict who became a successful businessman widely noted for his social engagement and philanthropy. Vidocq helped Hugo with his research for Claude Gueux and Le Dernier jour d'un condamné (The Last Day of a Condemned Man).[citation needed] In 1828, Vidocq saved one of the workers in his paper factory by lifting a heavy cart on his shoulders as Valjean does.[1] Hugo's description of Valjean rescuing a sailor on the Orion drew almost word for word on a friend's letter describing such an incident.[2] On 22 February 1846, when he had begun work on the novel, Hugo witnessed the arrest of a bread thief while a duchess and her child watched the scene pitilessly from their coach.[3]